Wang Xuejiao, Jiang Tianzhi, Huang Lishuo, Ye Renguang, Wang Juan, Hua Youjie, Zhao Jingtao, Bai Gongxun, Zhao Shilong, Zhang Junjie, Xu Shiqing
Opt Lett. 2024 Sep 15;49(18):5224-5227. doi: 10.1364/OL.534951.
It is crucial to explore the intrinsic mechanisms that influence thermometric sensitivity. This study investigates the optical performance of materials with the same crystal structure but different phonon energies. LnOS:Er/Yb (Ln = La/Gd/Y) phosphors with similar morphology and particle sizes were prepared to systematically study the influence of different phonon energy matrices on optical properties. The intrinsic mechanism was elucidated through the matching degree between the energy gap and phonon energy, Judd-Ofelt (J-O) theory, and quantum dielectric theory. It was ultimately concluded that the combination of high phonon energy with a large Ω and a small Ω is beneficial for enhancing the sensitivity of temperature sensing materials.
